Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. John C Kollar, DO

Individual provider Surgery Physician · NPI 1841227352

Dr. John C Kollar, DO is a General Surgery in Saddle Brook, New Jersey. Graduated from Rowan University School of Osteopathic Medicine in 1987, 39 years ago. Practices with Bergen County Improvement Authority, a 95-clinician group and accepts Medicare assignment. Licensed in New Jersey.

Years since qualifying
39
Trained at
Rowan University School of Osteopathic Medicine
Licensed in
NJ
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

449B Market St
Saddle Brook, NJ 07663-5941
Phone: (201) 712-7900
Fax: (201) 712-7902
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence MB52216 (NJ)

Record details

NPI number1841227352
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 28, 2006
Last updated in NPPESJanuary 27, 2010
Mailing address449b Market St, Saddle Brook, NJ 07663-5941

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Medical schoolROWAN UNIVERSITY SCHOOL OF OSTEOPATHIC MEDICINE
Graduated 1987 (39 years in practice)
Group practice Bergen County Improvement Authority — 95 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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